Magnetic sensing for auto focus position detection

Some embodiments include a method for measuring the position of a camera lens carrier moveable by an autofocus actuator. In some embodiments, the method includes generating a measurement of a magnetic field resulting at least in part from the one or more position sensor magnets. In some embodiments,...

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Bibliographische Detailangaben
Hauptverfasser:	Wong, Calvin K, Jeong, Ho Seop, Hubert, Aurelien R, Lee, Simon S
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	Some embodiments include a method for measuring the position of a camera lens carrier moveable by an autofocus actuator. In some embodiments, the method includes generating a measurement of a magnetic field resulting at least in part from the one or more position sensor magnets. In some embodiments, the generating the measurement of the magnetic field includes measuring a magnetic field component created at least in part by the one or more position sensor magnets fixedly mounted to the camera lens carrier. In some embodiments, the camera lens carrier is moveably coupled to a substrate by the autofocus actuator to provide motion in a direction orthogonal to the substrate. In some embodiments, the generating the measurement of the magnetic field component includes measuring the magnetic field component at a sensor fixedly mounted to the substrate of the autofocus actuator.